Stapling machine



May 3 1949- W. SCHAFROTH 2,469,054 STAPLING MACHINE A 4 Sheets-Sheet lFiled NOV. 19, 1945 ne/VEB SCHA F120 TH May 3, 1949. w. scHAFRoTl-lSTAPLING MACHINE 4 Sheets-Shea?I 2 Filed Nov. 19, 1945 H mm F .NF E A VHW. C 5 W .E WE

May 3, 1949. w. scHAFRoTH STAPLING MACHINE Filed Nov. 19; 1945 4Sheets-Sheec 5 /4/ INVEN TOR.

EKA/EZ 56H4 m70 TH Hfs Mmm/5% Patented May 3, 1949 fSTABLING MACHINEWerner AS charoth, Brookline, Pa., assignorto 'Internatonal Staple and`Machine Company,

Clifton HeiglitSR-Pa., a corporation of Pennsyl- Narnia.

AppleationNoyember 19, 1945, .Serial No...6Z9.,354

(El. E1---49`=) "Glaims.

'This invention .relates 'to 'gstapling 'machines `andparticularlyto'the type ,of machine :which is .used to secure 'the.'ilaps or ends of .closedccartons or containers Where the vstationaryanvil cannot ,be used.

The invention Tis an improvement over lsimilar machines ofmy,priorpatents,1o.;280,63fi, .dated 18, 1937., .and "No 2235.808,'dated March .4. -'19.41., in that the piercing anvils are .directly`actuated Vby .positive .links .and levers instead of .cams .or other.means .and .by .applying the I'foree through lever action instead ofcams., the l'ieof the v.anvils and .other operating parts iis considera-.hly extended.

The stapling machine of the type .with which .this invention .isconcerned includes, .as .characteristic elements., a pair .ofpenetrating -anvils `that are .actuated by suitable r`operating.instr-umentalities, .and these are guided Joy appropriate cam tracks ina sliding .plunger :to pierce the material being stapled .and cause .theYanx/ils to `assume a position whereby drivin-g of the staplethereagainst will fetect a clinching of .the staple .-legs.

The purpose4 of @the .invention is to provide .rnechan-ical means foractuating staple .clinching .anvils through an arc of about 100 degrees,hold- .ing ethem in `the .extreme or .clinching position, .and then,returning the any-ils to their .original ,positions with `.a `positive',and, .at .the reame vtime. easy movement, r-in which wear .of theoperating parts is reduced to a minimum.

:Due to :the .complex nature `of lthe movement --vvhich isimparted ,to.the Vpenetrating :any-ils dur-- -ing their ,piercing operations,:provide lin-.ks and levers directly vvconnected -'to the .-anv-ils and.a .plunger with cam tracks `for actuat- .ing the .links'andleyers .-I-nyiewrof theiact that .the .staple itself closely .fiollows .the movementof rthe penetrating anyils, l.excessive Wear :is `created upon .the-.camattacks associated .with the anvils :as in :the prior patents, whereas,by .applying .the force through the ,direct action of links .and,.levers, this Wear is eliminated.

.'Ihe ole-ject yof this .invention is, therefore, rto provide an.improvedstaplng ,machine-'Which ac- :tuates .anvlls .to-.theclinchingiposition on @the op- ;poste .side .of .materials to.beusecured .-'oy .the .staples, .and then .tonces .the staples throughthe :layers 'of material L.and .against .the `ani/ils, .which results inthe clinching operation forcing .the 'ends of theA ,staples upward,against the inside suraces .of the material.

More :in Ydetail thisinmmtion 'has in .View .as a Iurther;ob.eetiv.e.1the ,provision of ,a stapling it .-is necessary to misins.included Vcardboard 4 carton) Atakes zup a machine of `the type notedwhich includes a Y-rn'ovalole .guide plunger lwith ajlever forcing 'theplunger 'downward'together With 4associated operating nstrumentalities"that 'cause `the plunger to `be "moved into position, Vwhereby leverspivotally mounted on the casing 'and connected to 4anv'ils by links, areactuated 'by cams .on the levers extending into 'cam tracks in `theplunger to force the piercing anvils .through the material,

yand assume their ultimate position prior to the driving of the staple.

Associated `with 'this Iphase .of .the stapling .niachine is anextremely .important objective Which aims at the provision 'of amachinein winch 'the operations of .the penetrating .anviLs staple .guide`plate and staple driving mechanism are accurately and positivelysynchronized so as to insure of proper Voperation .of .the machine.

Yet .another object is assoc'iatedwith .this phase of .the invention and.deals .with the .provision .of novel and improved driving .connections.leetvveen 'the vpenetrating `anvils .and the ,operatinginstrurnentalities thereior.

In order to .meet presenttday conditions .prevailingin the rnanumitureocardboard cartons,

. and .other .similar .packages Whichalze .intended to 'be closedby thestapling machine of this .invention, and particularly .View `of thetoughness of 'the .materials which .must .be .-.pielced .in `order tocarry out 'the stapling operations, it is necessary that .the operatinginstrumentalities of the niachine loeeective ,todrive .the Ipenetrating.anvils and the .staple .driving vmechanism .withu extremely highvelocity.

The .creation .of these velocities gives rise to the setting up of ,alange number of sharp vshocks .and jars, which, taken up bythe machine.alone ,greatly reduces the service 4lite thereof.

vAccordingly .the .intention has .in view, .as a highly importantobjective, the provision of an arrangement .-in which ,the materialbeing {oper- :ated upon (such ras .the flaps fof a corrugated ,largeporation .oi .the shocks ,andgiers which eraan inevitable incident totheoperation of the machine..

Yet another :highly impOntant-ebieCt rof the in vention is the provisionof a novel and improved .casing .structure that-:is designed to Vhouseythe various means, mechanisms rand kinstrumentali ties making up the.machine of this invention.

.More detail the Aini/rention has fin `view .the ,provision 'of Aacasing structure which .serves `to Qperativel-y mount serious parts ofthe mechatherein. The rcasing .structure must be readily assembled anddisassembled as occasion demands, and an important phase of theinvention is the novel constructional features imparting theseproperties thereto. It is important that the casing structure be sodesigned that the machine may be readily manipulated and handled underconditions of practical usage. l Various other more detailed objects andadvantages such as arise in connection with the building, design andoperation of a stapling machine in accordance with the above notedobjectiveswill in part become apparent, and in part be hereinafterstated, as the description of the invention proceeds.

The invention, therefore, comprises a stapling machine including a pairof penetrating anvils pivotally mounted in the lower part of themachine, links rigidly attached to the anvils through the pivotalmounting levers pivotally attached to the links and fulcrumed in themachine upon a sliding plunger having cam tracks in which cams on thesaid levers extend, a staple feeding plate on the said plunger timed todrive a staple through material upon which the machine is placed andagainst the anvils after the anvils have moved into clinching position,a handle for operating the said plunger, and suitable staple feedingmeans,

For a full and more complete understanding reference may be had to thefollowing description and accompanying drawings wherein Figure 1 is aview showing a side elevation of the stapling machine with the head orvertical section shown in section.

Figure 2 is a view showing a front elevation on line 2 2 of Figure 1with the front plate removed.

Figure 3 is a similar section looking in the opposite direction withtheback plate removed showing the plunger moved downward to the position inwhich the anvils have been moved to the clinching position, and theplunger is in the position of starting a staple downward.

Figure 4 is a similar view showing the plunger at the extremity of itsdownward movement in which the ends of the staples are clinched againstthe anvils.

Figure 5 is a detail illustrating one of the anvils with the linkomitted at the end of the shaft thereof.

Referring now to the drawing wherein like reference characters denotecorresponding parts, a stapling machine made in accordance with thisinve'ition comprises a casing structure for housing which is formed witha vertical section i9 and a supporting leg having a foot l2, as shown inFigure 1, which provides supporting means holding the vertical sectionperpendicular to the base, or to the lsurface upon which the machine maybe used.

The vertical section of the machine is formed with a comparatively openslot or central hole, having a guiding partition i3 in the lower partthereof, and this is provided with a front plate |4 against whichstaples l5 are resiliently held by a follower I6, with a spring I7urging it toward the staples.

It will be understood, however, that the staples may be continuously fedor ieldingly held against the plate i by any other means.

Anvils l 8 and I9 are formed with integral shafts and 2| whicharerotatably mounted in the lower end of the partition I3 and provided attheir opposite ends with links 22 and 23, which 4 are pivotallyconnected to levers 24 and 25 through pins 26 and 21, and these arepivotally connected t0 upper links 28 and 29 through pins 3i) and 3| onthe inner ends of which rollers 32 and 33 are mounted which extend intocam tracks 34 and 35 in the sliding plunger or slider 36. The oppositeends of the links 28 and 29 are pivotally held on a pin 31, which isstationary, in a front wall 38 of the vertical part of the casing.

The upper end of slider 36 is formed with a slot 39 having ears 40 and4| at the sides in which an operating lever 42 is pivotally mounted i.againstl the plate 'zontal portions of the cam Aas shown in Figurevward in the staple track so. that the pointsthere- 0n a shaft 43. is ahandle 44 by which it is a pin 41.

This end of the lever 42 is pivotally attached to the link 45 through apin 48, and it will be noted that as the upper end or handle of thelever is moved downward in the direction of the arrow, the connection atthe pin 48 will move outward and then slightly inward permitting theshaft 43 to travel downward in a straight or perpendicular line.

On the inner surface of the slider 36 is a plate 49 which, when theslider is moved downward, engages a staple and forceslthe stapledownward through layers of material on which the machine is placed andagainst the inner or clinching surfaces 50 and 5| of the anvils, therebycausing the ends of the staple to assume the clinching positionsillustrated in Figure 4.

The anvils may be of any type or design. However, it is preferred to useanvils as illustrated in Figure 5 in which the body portions I8 and I9are integral with the shafts 2|) and 2|k and their peripheries aredescribed in an arc with the center of the radius corresponding with thecenter of the shaft. The piercing ends 5'2 lof the anvils are preferablypointed, as shown.

The casing may be fabricated with back and front plates i3 and 38, andend plates 53 and 54, as shown, or may be formed in any manner. Theupper portions of the plates I0 and 38 are provided with receiving slotsand 56, respectively, to receive the lever 4I as the lever is operated.

While the mode of operation of each of the above described parts will beunderstood from the foregoing specification, a comprehensive descriptionillustrating theV operation of the machine is hereinafter set forth.

In use the machine may be provided, as shown and described, and withstaples resiliently held I4 by a follower, as shown and described, andwith the machine placed against the surface of a container, the handlemay be moved toward the base and this will actuate the slider or plunger36 with its associated parts, and as the slider starts downward, it willfirst draw the rollers 32 and 33 inward along the horitracks 34 and 35and this motion will cause the links 22 and 23 to move from` theposition shown in Figure 2 to their respective dotted positions, shownin Figures Sand 4, and as these links are fiXedly mounted on the shafts20 and 2|, they will rotate the anvils so that their points will piercematerial At the upper end of the lever 42 and at the lower end is a link45 iixedly attached to ears 45 through vupon which themachine is placed,and continue lto move downward through the material position illustratedin Figure 3.

At this point the plate 49 will engage a staple,

3, and force the staple downto the of will pass through the material,and as the downward action is continued, the ends `:tif 'the t'lpleWill'fengage the curved fs'u'rfacs '5U-'arid fandfoll'ow these surfacesfarouhd to their' l're- ".pective positions, illustrated in Figure 4,t-liereby-cl-inTclif-ng the ends-of fth'ezst'alples against- -theunderisiiifface o -the material. the haindlef-is returned to thev lupperposition, the plunger will be drawn lupward and th'earifi-ls will `beWithdrawn through the openings in the material through which theyentered.

While preferred specific embodiments of the invention are hereinbeforeset forth, it is to be clearly understood that the invention is not tobe limited to the exact constructions illustrated and described, becausevarious modifications of these details may be provided in putting theinvention into practice within the purview of the appended claims.

What is claimed is:

l. A stapling machine comprising a casing, anvils rotatably mounted inthe lower part of the casing and positioned to extend beyond the casingwhen rotated, arms xedly attached to the anvils extending upward intothe casing. means connected to said arms for operative movement thereofto rotate the anvils to operative positions, and means driving staplesfrom the casing against said an 'ls, said anvil rotating means and saidstaple driving means being operated in the sequence that the anvilspierce the material against which the machine is placed, and the stapledriving means thereafter clinches the staples forced through thematerial and against the anvils.

2.A stapling machine comprising a casing, a staple track in said casingfor supporting staples, rotatable anvils positioned at one end of saidtrack and adapted to extend beyond the casing, arms integral with saidanvils and extending therefrom, a slider in said casing, meansoperatively connecting said slider to the arms of the anvils, means onsaid slider for forcing said staples into grooves formed in the anvils,the actuation of Said slider effecting first the piercing of thematerial by the anvils and retaining them in a clinching position duringthe period the staples are forced through the material and against theanvils.

3. A stapling machine comprising a casing, a

lstaple track in said casing, rotatable anvils positioned at one end ofsaid track and adapted to extend beyond the casing, arms adapted torotate said anvils and extending therefrom, a slider in said casinghaving cam tracks therein, rollers extending into said cam tracks, linksattached to said rollers and casing, and other links attached to saidrollers and said arms for actuating the anvils through said arms.

4. A stapling machine comprising a casing, a staple track in saidcasing, rotatable anvils positioned at one end of said track and adaptedto extend beyond the casing, arms adapted to rotate said anvils andextending therefrom, a slider having L-shaped cam tracks therein,rollers extending into said cam tracks, links attached to said rollersand casing, other links pivotally attached to said rollers and said armsfor actuating the anvils through the arms.

5. A stapling machine comprising a casing, a staple track in saidcasing, rotatable anvils mounted on fixed axes at one end of said trackand adapted to extend beyond the casing, arms adapted to rotate saidanvils and extending therefrom, a slider having cam tracks therein, aseries of links pivotally mounted in said casing connected to "tl-fie"lbi tlieiiivs and a toggle arrangement for ,-actuating vthe links throughthe cam tracks of the slider. v K y Y 6. A stapling machine comprising acasing, a staple track in Lsaid casing, rotatable anvils mounted onfixed axes at one` end of said track and adapted to extend beyond thecasing, arms adapted to rotate said anvils and extending therefrom, aslider having cam tracks therein, a series of links pivotally mounted insaid casing connected to the arms of the anvils, and rollers on saidlinks extending into said camtracks for operating the levers.

'7. A stapling machine comprising a casing, a staple track in saidcasing, rotatable anvils mounted on fixed axes at one end of said trackand adapted to extend beyond the casing, arms adapted to rotate saidanvils and extending therefrom, a slider having cam tracks therein, aseries of links pivotally mounted in said casing connected to the armsof the anvils and constituting a system of toggle members, and rollerspositioned at sliding points of said rst links actuated by said camtracks for operative movement of the links and anvils.

8. A stapling machine comprising a casing, a staple track in saidcasing, rotatable anvils positioned at one end of said track and adaptedto extend beyond the casing, arms adapted to rotate said anvils andextending therefrom, a slider having cam tracks therein, a set of linkspivotally attached to the arms of the anvils, another set of linkspivotally mounted on a fixed pin of the casing and 4pivotally connectedto said rst mentioned links, and rollers on said last mentioned linksextending into the cam tracks of said slider.

9. A stapling machine comprising a casing, a staple track in saidcasing, rotatable anvils positioned at one end of said track and adaptedto extend beyond the casing, arms adapted to rotate said anvils andextending therefrom, a slider in said casing, rst links pivotallyattached to the arms of the anvils, second links slidably connecting thefirst links to a xed point of the casing, and a mechanism including ahandle and lever associated with said link system for operative movementof said link system to rotate said anvils.

10. A stapling machine comprising a casing, anvils rotatably mounted inthe lower part of the casing and positioned to extend therebeyond whenrotated to an operative position, arms xedly attached to the anvilsextending upwardly into the casing, staple driving means for clinching astaple against said anvils, said anvil rotating means and said stapledriving means being connected by a slider operated by a system of linksconnected in a toggle arrangement, one set of links being pivotallyattached to said anvil arms, and to rollers adapted to move verticallyand laterally in cam tracks provided in said slider, a second set oflinks having one of their ends connected to a stationary pin carried bysaid casing and their other ends attached to the roller ends of saidsecond set of links, staple feeding means controlled by said slider, anda lever for reciprocating said slider in a plane vertical to the casing,whereby the reciprocation of said slider is translated through said linksystem to rotate said anvils and clinch a staple thereagainst at theextreme downward movement of the slider.

WERNER SCHAFROTH.

(References on following page) The following refer 7 REFERENCES CITED leof this patent:

UNITED STATES PATENTS Number Name Matveye Matveye ences are of record inthe Date Mar. 17, 1931 Sept. 20, 1932 Number 8 Name Date Taylor Aug. 20,1935 Matveyei May 18, 1937 Maynard Sept. 22, 1936 Schafroth May 18, 1937Matveyeff Dec. 5, 1939 Maynard Apr. 2, 1940 Schafroth Mar. 11, 1941

